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(11)

EP 3 212 841 A1

(12)

(43) Date of publication: 06.09.2017 Bulletin 2017/36 (21) Application number: 15855915.3 (22) Date of filing: 26.10.2015

(51) International Patent Classification (IPC):  D21C 9/00(2006.01) C08B 15/00(2006.01) D21H 11/18(2006.01) C12P 19/00(2006.01) C08B 1/00(2006.01) C12P 1/00(2006.01) D21H 11/20(2006.01) D21H 15/02(2006.01) (86) International application number: PCT/IB2015/058238 (87) International publication number: WO 2016/067180 (06.05.2016 Gazette 2016/18)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA (30) Priority: 28.10.2014 SE 1451287 (71) Applicant: Stora Enso OYJ 00101 Helsinki (FI)	(72) Inventors: AXRUP, Lars S-663 41 Hammarö (SE) KASTINEN, Henri FI-55100 Imatra (FI) (74) Representative: Lindberg, Berndt Åke  Stora Enso AB Group Intellectual Property Box 9090 650 09 Karlstad 650 09 Karlstad (SE)